Panasonic TX-20LA5F Page 20 Service Manual Download | Manualshive

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Summary of Contents for TX-20LA5F

Page 1: ...A2 33 05MHz NICAM B G D K L 32 4MHz D K 32 66MHz CZ STEREO 40 4MHz L 39 75Mhz L NICAM Colour 34 47MHz PAL 34 5MHz 34 65MHz SECAM 38 3MHz 38 15MHz SECAM L Terminals AV1 IN Video 21 pin 1V p p 75Ω Audio 21 pin 500mV rms 10kΩ RGB 21 pin 0 7V p p 75Ω AV1 OUT Video 21 pin 1V p p 75Ω Audio 21 pin 500mV rms 1kΩ AV2 IN S Video IN Y 1V p p 75Ω 4 pin C 0 3V p p 75Ω Audio RCAx2 500mV rms 10kΩ Video RCAx1 1V ...

Page 2: ...TOUCH CURRENT CHECK 1 Plug the AC cord directly into the AC outlet Do not use an isolation transformer for this check 2 Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground such as a water pipe as shown in Fig 2 3 Use Leakage Current Tester Simpson 228 or equivalent to measure the potential across the measuring network 4 Check each ex...

Page 3: ...om its protective package until immediately before you are ready to install it Most replacement ES devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of a replacement ES device touch the protective material to the chassis or circuit assembly into which ...

Page 4: ...r has a higher melting point than standard solder Typically the melting point is 50 70 F 30 40 C higher Please use a high temperature soldering iron and set it to 700 20 F 370 10 C Pb free solder will tend to splash when heated too high about 1100 F or 600 C If you must use Pb solder please completely remove all of the Pb free solder on the pins or solder area before applying Pb solder If this is ...

Page 5: ...ACK COVER Lay the main unit face down as shown in Fig 5 Remove the 4 fixing screws as shown in Fig 6 Remove the stand assembly Remove the 8 fixing screws as shown in Fig 7 Remove the back cover SCREWS SCREWS SCREWS 5 Fig 5 Fig 6 Fig 7 ...

Page 6: ...nes and hexadecimal code of the TV set To enter Self Check mode keep pressing the STATUS button on the remote control and press the down v button on the customer controls at the front the TV set To exit Self Check switch off the TV set at the power button If the CCU ports have been checked and found to be incorrect or not located then will appear in place of O K E2 O K DPS O K VSP O K AVSW O K TUN...

Page 7: ...front of the TV this will place the TV into the Service Mode 1 2 Press the RED GREEN buttons to step up down through the functions 3 Press the YELLOW BLUE buttons to alter the function values 4 Press the OK button after each adjustment has been made to store the required values 5 To exit the Service Mode press the N button Alignment Function Setting indication Note All setting values are approxima...

Page 8: ...500 AV1CVBS 53 VSP9405BVKC4 61 TXT CVBS AV2 V 57 AV2 C 56 52 TVCVBS AV2 Y 55 AV1 V OUT 63 B EXT 41 G EXT 40 R EXT 39 2 1 3 Z1 5 R2351 R2350 11 9 A12 11 9 B1 3 A2 5 Q202 Q201 JK3000 V L R AV2 terminal C Y IC1100 SDA5550M 21 TXT CVBS AD_656 0 AD_656 7 IC1700 DPS9450A OSD R IN1 131 OSD G IN1 132 OSD B IN1 133 57 OSD R 58 OSD G 59 OSD B Q1500 Q1502 AD_656 0 AD_656 7 8 8 13 B BOARD A BOARD Z BOARD TO L...

Page 9: ...C 2 SBY3 3V_D IC1105 RESET IC 2 24V IC1500 VSP9405 5 28 34 66 1 8V_D 3 3V_D 7 12 25 72 35 42 50 64 1 8V_A 3 3V_A 1 44 59 75 78 A6 1 SERVICE 5 0V A50 2 Q1700 5 0V A4 1 5 24V_INV LCD PANEL A BOARD IC1700 DPS9450A 5 20 32 40 48 57 68 78 86 96 104 112 123 24 62 91 118 129 139 DPS_3 3DIG DPS_1 8DIG DPS_3 3ANA 75 134 143 DPS_1 8ANA 33V 5V SBY3 3V 24V 68 1 8V_VSP D851 D852 D853 15 16 4 5 IC866 REG 1 4 IC...

Page 10: ... 3 3V 13 BUSREQ 14 RST 15 RESET 24 KEYSCAN 25 AFC 27 SLOW1 31 PROT1 33 RC_IN AV_LINK_IN 34 SERVICE 37 STBY_LED 44 XTAL2 52 XTAL1 53 WR_OUT 64 RD_OUT 65 PSEN_OUT 88 Q1108 Q1109 Q1101 Q1100 RST 5 0 RST 3 3 LEVEL SHIFTER Q1103 Q1104 LEVEL SHIFTER SCL1 5 0 SDA1 5 0 SCL2 5 0 SDA2 5 0 SDA2 3 3 SCL2 3 3 IC1101 EAROM 6 SCL1 3 3V 5 SDA1 3 3V Q1107 Q1106 BUSREQ IC1105 RESET IC VOUT 1 KEYSCAN AFC SLOW1 RC_IN...

Page 11: ...S LOCATION 11 NOTE The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List 2 22 28 19 3 4 10 9 8 21 16 12 31 23 1 29 11 5 26 13 15 30 17 18 25 6 7 14 24 20 27 ...

Page 12: ...39 1 AC CORD BRACKET TMW0E904 CARTON TPC0E63601 BOTTOM CUSHION TPD0E0046 TOP CUSHION TPD0E0047 SCREW XTN3 10J SCREW XTV3 12JFJ SCREW XYN4 J10FJ I C s AUDIO AMPLIFIER IC250 TDA1517 N3 RESET IC IC251 C0EBF0000086 MAIN PS CONTROL IC801 F9222L F219 PHOTO COUPLER IC802 B3PAA0000363 PHOTO COUPLER IC803 B3PAA0000363 VOLTAGE REF IC IC850 TL431AILPM STEP UP DC CONVERTER IC860 C0DBAMA00015 2 5V REGULATOR IC...

Page 13: ... TRANSISTOR Q1109 2N7002 TRANSISTOR Q1207 BC847B TRANSISTOR Q1208 BC847B TRANSISTOR Q1500 BC847B TRANSISTOR Q1501 BC847B TRANSISTOR Q1502 BC857B TRANSISTOR Q1503 BC857B TRANSISTOR Q1700 B1DHDC000028 TRANSISTOR Q1701 BC847B TRANSISTOR Q1702 BC847B TRANSISTOR Q1703 BC847B TRANSISTOR Q1706 UNR221500L TRANSISTOR Q1707 BC847B TRANSISTOR Q1710 BC857B TRANSISTOR Q1711 BC857B TRANSISTOR Q1713 2N7002 TRANS...

Page 14: ...Ω S M CARB R856 ERJ6GEYJ103 0 1W 5 10K Ω SMD R857 ERJ6ENF2702V 125W 1 27K Ω S M CARB R858 ERJ6ENF6801 0 1W 1 6K8 Ω SMD R859 ERJ6ENF3901 125W 1 3K9 Ω S M CARB R860 ERJ6GEYJ102 0 1W 5 1K Ω S M CARB R861 ERJ6GEYJ104 0 1W 5 100K Ω S M CARB R862 ERJ6GEYJ223 0 1W 5 22K Ω S M CARB R864 ERJ6GEY0R00 0 1W 0 Ω S M CARB R865 ERJ3GEYJ153V 0 1W 5 15K Ω S M CARB R866 ERJ3GEYJ563V 0 1W 5 56K Ω S M CARB R867 ERJ6G...

Page 15: ... 1W 5 4K7 Ω S M CARB R1206 ERJ3GEYJ223V 0 1W 5 22K Ω SMD R1207 ERJ3GEYJ101 0 1W 5 100 Ω SMD R1211 ERJ3GEYJ472 0 1W 5 4K7 Ω SMD R1214 ERJ3GEYJ222 0 1W 5 2K2 Ω SMD R1215 ERJ3GEYJ103 0 1W 5 10K Ω SMD R1220 ERJ3GEYJ222 0 1W 5 2K2 Ω SMD R1228 ERJ3GEYJ222 0 1W 5 2K2 Ω SMD R1500 ERJ3GEYJ331 0 1W 5 330 Ω SMD R1501 ERJ3GEYJ820 0 1W 5 82 Ω SMD R1502 ERJ3GEYJ820 0 1W 5 82 Ω SMD R1503 ERJ3GEYJ820 0 1W 5 82 Ω ...

Page 16: ...J6GEYJ473 0 1W 5 47K Ω S M CARB R3866 ERJ6GEYJ103 0 1W 5 10K Ω S M CARB R3867 ERJ6GEYJ220 0 1W 5 22 Ω CAPACITORS ELECT C100 ECA1CM221GB 16V 220µF S M CAP C101 ECJ2VB1H102K 50V 1nF S M CAP C102 ECJ2FB1H104 50V 100nF ELECT C106 ECA1HMR33GB 50V 0 33µF ELECT C107 ECA1CM221GB 16V 220µF S M CAP C108 ECUV1H104KBX 50V 100nF S M CAP C109 ECUV1H104KBX 50V 100nF S M CAP C110 ECUV1H103JCN 50V 10nF S M CAP C20...

Page 17: ...470GB 16V 47µF S M CAP C1519 ECJ1VF1E104 25V 100nF S M CAP C1520 ECJ2FB1H104 50V 100nF S M CAP C1521 ECJ2FB1H104 50V 100nF S M CAP C1522 ECJ2FB1H104 50V 100nF ELECT C1523 ECA1CM100GB 16V 10µF S M CAP C1524 ECJ2FB1H104 50V 100nF S M CAP C1525 ECJ2FB1H104 50V 100nF S M CAP C1526 ECJ1VC1H331 50V 330pF ELECT C1527 ECA1CM470GB 16V 47µF S M CAP C1528 ECJ1VF1E104 25V 100nF S M CAP C1529 ECJ1VF1E104 25V 1...

Page 18: ...61J 50V 560pF S M CAP C3004 ECJ1VC1H561J 50V 560pF S M CAP C3005 ECJ1VC1H561J 50V 560pF S M CAP C3006 ECJ1VC1H561J 50V 560pF ELECT C3007 ECA1CM100GB 16V 10µF ELECT C3008 ECA1CM100GB 16V 10µF S M CAP C3016 ECJ1VC1H561J 50V 560pF S M CAP C3020 ECJ1VC1H561J 50V 560pF TERMINALS AND LINKS A2 Z1 WIRE A2 Z1 TXAJTA2ACPE A3 V1 WIRE A3 V1 TXAJTA3ACPE 14P CONNECTOR A4 K1KA14BA0051 A4 INVERTER WIRE A4 INV TXA...

Page 19: ... printing and are subject to change without notice REMARKS a Do not touch the hot part or the hot and cold parts at the same time as you are liable to a shock hazard b Do not short circuit the hot and cold circuits as electrical components may be damaged c Do not connect an instrument such as an oscilloscope to the hot and cold circuits simultaneously as this may cause fuse failure Connect the ear...

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Page 25: ...02 A6 Q872 D5 IC1102 C4 Q1503 A6 Q873 D5 IC1103 D3 Q1700 C6 Q880 C4 IC1104 B3 Q1701 C4 Q881 C5 IC1105 B2 Q1702 B6 Q882 C5 IC1500 A5 Q1703 B4 Q890 D1 IC1700 B5 Q1706 C6 Q895 D5 IC1701 C5 Q1707 C5 Q896 D5 IC2000 B1 Q1710 C4 IC250 D2 Q1711 B4 DIODES IC251 C2 Q1713 C5 D1700 B6 IC860 D1 Q1717 B6 D1703 C6 IC862 C2 Q1718 B6 D854 D4 IC866 D5 Q1719 B6 D861 C2 IC871 D4 Q1720 B6 D862 D1 IC881 C4 Q1721 C4 D86...

Page 26: ...A BOARD TNP8EAL30 bottom TRAN S Q1207 B3 Q1208 B3 Q860 D1 Q891 D1 DIODES D870 D2 D873 D6 D877 D4 D883 C4 1 2 3 4 5 6 A B C D 26 ...

Page 27: ...03 D1 Q804 C1 Q805 C1 Q806 D2 Q851 D4 DIODES D801 B1 D802 D1 D803 D1 D804 E1 D805 E1 D806 D1 D807 E3 D808 D1 D809 D3 D810 D3 D811 D2 D812 D3 D813 D3 D851 E6 D852 D6 D853 D5 D855 E4 IC S IC801 E2 IC802 E4 IC803 E4 IC850 E4 1 2 3 4 5 6 B C D E 27 ...

Page 28: ...V BOARD TNP8EVL30 TRAN S Q1060 Q1061 Q1062 DIODES D1051 D1060 IC S RM1050 DIODES D2350 Z BOARD TNP8EZL30 28 ...

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